JPH03284807A - Transformer - Google Patents

Abstract

PURPOSE:To positively ensure a safe distance by inserting and holding the lower-end collar section of a fitting bobbin into a U-shaped groove section formed to one part of the lower-end collar of a bobbin on the innermost side. CONSTITUTION:An upper-end collar 22 is formed at the upper end of the bobbin 21 of a first bobbin on the innermost side and a lower-end collar 23 at a lower end. A U-shaped groove 39 is formed to the lower-end collar 23. A second bobbin is inserted and fitted from an upper section, a lower-end collar 30 is positioned in the U-shaped groove 39 of the first bobbin, and an upper-end collar 29 is inserted in a shape that it wraps the upper-end collar 22 of the first bobbin. The lower-end collar 35 of a third bobbin is positioned in the U-shaped groove 39 of the first bobbin, but a notch section 40 is formed to the lower-end collar 35, and structure in which the projection 41 of the U-shaped groove 39 of the first bobbin is fitted at the position is formed. An upper-end collar 54 is inserted to an upper end section so as to wrap the whole upper-end collar 29 of the second bobbin.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a transformer used in various audio equipment, video equipment, etc.

BACKGROUND OF THE INVENTION FIGS. 3a-3c are perspective views showing the structure of a winding frame of a conventional transformer in the order of assembly steps, and FIG. 4 is a sectional view of the transformer.

This will be explained using FIG. FIG. 3(a) shows the first boppin. A lower end collar 2 and a lower end #F3 are provided at both ends of the winding frame l of the innermost first boppin.

There are enlarged portions 4 at both ends of the lower end collar 3, and terminals 5 made of metal pins are implanted in the enlarged portions 4.

After the winding is done on the winding frame 1, the lead wire 7 is hooked onto a protrusion 6 provided on a part of the lower end collar 2 and wired to the terminal 5.
Next, FIG. 3(b) shows the second bopin fitted.

A lower end collar 9 and a lower end collar 10 are provided at both ends of the winding frame 8 of the second bopin. After that, a lead wire is hooked onto the protrusion 11, passed between the wiring protrusions 12, and connected to the terminal 5. A plurality of windings are made in a similar manner on this second bopin.

FIG. 3(C) shows the third bopin fitted. Third
A lower end collar 14 is provided at the upper end of the winding frame 13 of the boppin, and a lower end collar 15 is provided at the lower end. After winding the wire on the winding frame 13, the lead wire is hooked onto the protrusion 16 and then hooked onto the wiring protrusion 17.
The wiring is connected to the terminal 5 through the space between the two terminals.

At this time, the second. Bottom end of the third bopin! 10.15 is abutted and supported by the lower end collar 3 of the innermost first bopin.

The structure at the time of fitting will be explained in detail using FIG. 4.

The lower end flange has a structure in which the lower end flange IO of the second boppin and the lower end flange 15 of the third boppin are gathered on the lower end flange 3 of the innermost first bopin. In addition, the lower end tsuba 2, 9
．． 14 had a coplanar structure. At this time, the distance between the secondary coil 20 on the upper end flange side and the iron core 18 is 9
It was only the thickness of

Further, the lower end flange side was constituted by the sum of the width of the lower end flange 15 of the third boppin and the thickness of the lower end flange 10 of the second boppin.

Problems to be Solved by the Invention In such a conventional configuration, in order to satisfy the distance between the secondary coil 20 and the iron core 18 of the transformer determined by various safety standards, the thickness of the flange at the upper end flange must be adjusted. It is necessary to increase the thickness of the lower end tsuba at the lower end.

This will be further explained using FIG. 4. Secondary coil 20 at the lower end of the second boppin where the secondary coil 20 is wound
What is the distance between and iron core 18? 1 and t2x, and the thickness is of the lower end flange 9 at the upper end.In order to satisfy the insulation distances of various safety standards, each conforming safety distance is different, but approximately several mm or more is required. In such a case, the problem was that the transformer would become extremely large.

Furthermore, if lt is made large at the lower end, a very large space will be created between the primary coil 21 and the iron core 18, and the iron core 18 will become large, resulting in a large magnetic resistance.
This was also a factor in reducing the efficiency of the transformer.

Means for Solving the Problem In order to solve this problem, the present invention provides that each winding frame into which a plurality of winding frames are inserted and fitted has a cylindrical part around which a coil is wound, and the cylindrical part An upper end flange and a lower end flange are provided on the outer periphery of the upper and lower ends of the frame, and a metal pin terminal is embedded in the lower end flange of the innermost winding frame, and a U-shaped groove is formed between the left and right lower end flange. The lower end flanges of the other winding frames are inserted into the U-shaped groove, and the lower end flanges are inserted and fitted into the inner winding frames so that they are stacked in order from the lower end flanges of the inner winding frames.

Function: With this configuration, it is possible to ensure a safe distance by inserting and sandwiching the lower end flange of the fitting boppin into the U-shaped groove formed in a part of the lower end flange of the innermost boppin. In addition, since the upper part of the inner boppin is stacked in order from the lower end flange to the upper part of the inner boppin, the thickness of the tsuba that was required in the past is not necessary, making it possible to maintain a thin wall and secure distance. It can be made extremely compact.

Furthermore, by making the bopin extremely small, the iron core can also be made smaller, making it possible to have an iron core with low magnetic resistance, and it is also possible to increase efficiency.

EXAMPLE An example of the present invention will be described below. FIG. 1 shows an assembly process of a transformer according to the present invention, and FIG. 2 shows a sectional view of the present invention.

The structure of the transformer of the present invention will be explained using FIGS. 1 and 2.

In FIG. 1(a), the winding frame 21, which is the innermost first boppin, has flanges at both ends, the upper end has a lower end collar 22, and the lower end has a lower end #f23. The lower end flange 23 has enlarged portions 24 at both ends, and terminals 25 are implanted in the enlarged portions 24. Further, the lower 3ti collar 23 has a U-shaped groove 39 between the enlarged portions 24 at both ends. After winding the coil on the winding frame 21, the lead wire is
It is connected to a protrusion 26 provided on the lower end collar 22 by wrapping it around a hook terminal 25. Figure 1 shows the second bopin fitted. This second bopin is provided with a lower end collar 29 having a protrusion 31 for hooking the lead at the upper end of the winding frame 28, and a lower end collar 30 is provided at the lower end. The lead wire is hooked onto the protrusion 31, passed through the groove between the wiring protrusions 32, and wired to the terminal 25. A plurality of coils are wound around this second bopin. 1st
Figure C is a diagram in which a third bopin is further fitted. At the upper end of the winding frame 33, there is a lower end collar 3 having a lead hooking protrusion 36.
4, and a lower end flange 35 is provided at the lower end.

The coil is wound around a winding frame 33, and the lead wire is hooked onto a protrusion 36, passed between wiring protrusions 37, and connected to the terminal 25 by wire.

Next, the structure of the boppin of the above-mentioned fitting structure will be explained using FIG. 2. An upper end [22] is provided at the upper end of the winding frame 21 of the innermost first boppin, and a lower end collar 23 is provided at the lower end.

This lower end collar 23 is provided with a U-shaped groove 39. The second bopin is inserted and fitted from the upper part, and the lower end collar 30 is inserted into the first bopin.
located in the U-shaped groove 39 of the bopin, and the lower end collar 29
is inserted so as to enclose the lower end collar 22 of the first boppin. Further, the lower end flange 35 of the third boppin is also located in the U-shaped groove 39 of the first bopin, but this lower end flange 35 has a notch 40, and the lower end flange 35 of the first bopin is located at this position. The structure is such that the protrusion 41 of the square groove 39 fits therein. The upper end portion is inserted such that the lower end collar 34 surrounds the entire lower end collar 29 of the second bopin. An EE type laminated iron core 38 is incorporated into the fitting bopin wound in this way to constitute a transformer. 42 is a primary coil wound around the first boppin, 43 is a secondary coil wound around the second boppin, and 44 is a primary coil wound around the third boppin.

As explained above, by adopting the structure of the present invention, the insulation distance between the iron core 38 and the secondary winding can be easily obtained. This will be explained in detail using FIG.

Conventionally, the insulation distance between the iron core and the winding at the lower end of the bopin is tlr! ! and! It was the sum of 4, but in the present invention! 1 and 2. and 2. It is the sum of 14 and ! = length is longer than before! , is l o + j! 4 can be shortened by 18 minutes, making it possible to make the transformer smaller.

In addition, the upper end flange is conventional! , but in the present invention! , and lk, the conventional lower end tsuba 2
Although the thickness is of 9 was extremely long, it was possible to shorten it by the unnecessary length lh, making it possible to make the height of the transformer extremely low.

By adopting the structure as described above, the transformer and the boppin of the transformer can be made very small, and the insulation distance between the iron core and the winding can be reliably obtained.

Furthermore, since the bopin can be made smaller, the iron core can also be made smaller, so the magnetic resistance of the iron core is also reduced, and the efficiency of the transformer can be improved.

As explained above, according to the present invention, it is possible to realize a highly efficient transformer that is extremely small, secures insulation distance, and has high efficiency.

[Brief explanation of drawings]

Figures 1a-c are perspective views showing the assembly process of the transformer of the present invention, Figure 2 is a sectional view of the transformer of the present invention, Figure 3a
-c is a perspective view showing the assembly process of a conventional transformer, and FIG. 4 is a sectional view of the conventional transformer. 21... Winding frame, 22... Lower end flange, 23
... lower end tsuba, 24 ... ampullary part, 25.
...Terminal, 26...Protrusion, 27...
... Lead wire, 28 ... Winding frame, 29 ...
・Lower end tsuba, 30...Lower end tsuba, 31...
Protrusion, 32... Protrusion for wiring, 33...
Winding frame, 34...lower end flange, 35...lower end flange, 36...protrusion, 37...wiring protrusion, 38... Iron core, 39...Groove, 40
・・・・・・Cut portion, 41 ・・・Protrusion, 42.
44...Primary coil, 43...Secondary coil.

Claims (1)

[Claims] Each winding frame into which a plurality of winding frames are inserted and fitted has a cylindrical part around which a coil is wound, and an upper end flange and a lower end flange are provided on the outer periphery of the upper and lower ends of this cylindrical part. The lower end flange of the winding frame has an enlarged part, a metal pin terminal is implanted in this enlarged part, and a U-shaped groove is provided between the enlarged parts of the left and right lower end flanges. The lower end flange of the transformer is inserted into the U-shaped groove, and the upper end flange is inserted and fitted so as to be stacked in order from the upper end flange of the inner winding frame.